What's the fucking point of spamming affiliates? For affiliates, that could provide any value to your company, this is a major turn off. And those, who you convert with your spam, are not gonna do any volume anyway. That's how I see it.
omg! omg! the world is coming to an end.... Or you could just do what I did months ago, and block their whole spammy domain. No more emails, offers for Super Affiliate trips to Bermuda or in their case more likely a shack in central Burma!